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100 lines
2.4 KiB
Rust
100 lines
2.4 KiB
Rust
//@ compile-flags: -Copt-level=3
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//@ only-64bit (because the LLVM type of i64 for usize shows up)
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#![crate_type = "lib"]
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use std::ops::Range;
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// CHECK-LABEL: @index_by_range(
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#[no_mangle]
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pub fn index_by_range(x: &[u16], r: Range<usize>) -> &[u16] {
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// CHECK: sub nuw i64
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&x[r]
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}
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// CHECK-LABEL: @get_unchecked_by_range(
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#[no_mangle]
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pub unsafe fn get_unchecked_by_range(x: &[u16], r: Range<usize>) -> &[u16] {
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// CHECK: sub nuw i64
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x.get_unchecked(r)
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}
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// CHECK-LABEL: @index_mut_by_range(
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#[no_mangle]
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pub fn index_mut_by_range(x: &mut [i32], r: Range<usize>) -> &mut [i32] {
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// CHECK: sub nuw i64
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&mut x[r]
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}
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// CHECK-LABEL: @get_unchecked_mut_by_range(
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#[no_mangle]
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pub unsafe fn get_unchecked_mut_by_range(x: &mut [i32], r: Range<usize>) -> &mut [i32] {
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// CHECK: sub nuw i64
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x.get_unchecked_mut(r)
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}
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// CHECK-LABEL: @str_index_by_range(
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#[no_mangle]
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pub fn str_index_by_range(x: &str, r: Range<usize>) -> &str {
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// CHECK: sub nuw i64
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&x[r]
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}
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// CHECK-LABEL: @str_get_unchecked_by_range(
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#[no_mangle]
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pub unsafe fn str_get_unchecked_by_range(x: &str, r: Range<usize>) -> &str {
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// CHECK: sub nuw i64
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x.get_unchecked(r)
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}
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// CHECK-LABEL: @str_index_mut_by_range(
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#[no_mangle]
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pub fn str_index_mut_by_range(x: &mut str, r: Range<usize>) -> &mut str {
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// CHECK: sub nuw i64
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&mut x[r]
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}
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// CHECK-LABEL: @str_get_unchecked_mut_by_range(
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#[no_mangle]
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pub unsafe fn str_get_unchecked_mut_by_range(x: &mut str, r: Range<usize>) -> &mut str {
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// CHECK: sub nuw i64
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x.get_unchecked_mut(r)
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}
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// CHECK-LABEL: @slice_repeated_indexing(
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#[no_mangle]
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pub fn slice_repeated_indexing(dst: &mut [u8], offset: usize) {
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let mut i = offset;
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// CHECK: panic_bounds_check
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dst[i] = 1;
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i += 1;
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// CHECK: panic_bounds_check
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dst[i] = 2;
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i += 1;
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// CHECK: panic_bounds_check
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dst[i] = 3;
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i += 1;
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// CHECK: panic_bounds_check
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dst[i] = 4;
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}
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// CHECK-LABEL: @slice_repeated_indexing_coalesced(
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#[no_mangle]
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pub fn slice_repeated_indexing_coalesced(dst: &mut [u8], offset: usize) {
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let mut i = offset;
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if i.checked_add(4).unwrap() <= dst.len() {
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// CHECK-NOT: panic_bounds_check
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dst[i] = 1;
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i += 1;
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// CHECK-NOT: panic_bounds_check
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dst[i] = 2;
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i += 1;
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// CHECK-NOT: panic_bounds_check
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dst[i] = 3;
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i += 1;
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// CHECK-NOT: panic_bounds_check
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dst[i] = 4;
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}
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// CHECK: ret
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}
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